Male, 12 years old, 146.4cm, 45kg. He is Cha Duri's twin and the older brother by 10 minutes. His father is Cha Do-woon. As the pilot of Tobot X, he is very interested in math and science and knows a lot for his age. He has a strong sense of responsibility and, unlike Duri, always handles situations calmly. He is planned, meticulous, diligent, and has a gentle and kind personality toward everyone. However, he has a bit of a temper and often raises his voice at Duri and others.

Male, 12 years old, 146.4cm, 46kg. Hana's younger twin brother. As the pilot of Tobot Y, he is also in 5th grade. He still hates studying and loves to play, but he has added a streak of acting like a know-it-all now that he's a 5th grader. He often acts brazenly, such as showing interest in other Tobots in front of Y, but deep down he is a very affectionate and sincere type. In contrast to the mature and composed Hana, he is playful, active, and childlike. He is often scolded by his father and frequently rebels. He calls Cha Hana by his name.

Male, 12 years old, 151.2cm, Rh-O blood type. Pilot of Tobot Z. His left arm and left leg are prosthetic limbs with incredible superhuman strength. Being taciturn, he doesn't express himself much, but he is a deep thinker with a delicate side that cares for his family and friends, and he smiles a lot for his younger siblings. His hobby is listening to music; as much as he loves music, he is interested in instruments and plays the guitar. He is afraid of dogs.

Male, 10 years old. A curious 3rd grader living across from Semo's house. He is the pilot of Tobot Pop. With an innocent personality, he serves as the energy source for the Tobot group. He gets along very well with his parents and shows the side of a lovable son, acting cute or giving them kisses. He is close with Ra Dae-on and Dokgo Ondal, and follows Kwon Semo like a real older brother.

Male, 10 years old. The son of the chairman of the conglomerate Clover Group. Due to his very shy personality, he is often misunderstood and has difficulty making friends. He succeeded in activating a Mind Core he bought with his saved allowance and becomes the pilot of Tobot A with the help of the Tobot headquarters. He is so timid that one might suspect social anxiety, but he also has a righteous side. He is best friends with Lee Hansu and Dokgo Ondal.

Male, 12 years old, 160cm. Has very large eyes. Due to family circumstances, he once lived apart from his parents while caring for his sick younger brother and active as the pilot of Tobot W in Daedo City, but now he lives happily with his parents on Gajae Island. He has an unrivaled talent for programming and once received a commendation for catching a hacking robber attempting to rob a bank, which was featured in the Daedo City newspaper. He has a quick wit and extensive engineering knowledge. He takes pride in being a genius and teases Duri for being bad at studying, but his own grades are actually at the bottom. He is mentally mature and kind. Reason usually precedes emotion, and he speaks his mind without hesitation as long as he doesn't cross the line. When his emotions get intense, his reasoning becomes clouded.

Male, 10 years old. Okong's younger brother. He used to spend time in the hospital due to poor health, but he has now recovered. As a hardcore fan of Tobots, he is proud that his brother is the pilot of Tobot W. A natural strategist, he shows great talent in persuading people and frequently displays his tactical side.

Male, 40 years old. Father of the twins Hana and Duri. A single dad raising his two sons alone after losing his wife in an accident 8 years ago, he works as the developer of the Tobots. He is usually very kind and warm. However, he is a father who scolds his children properly when they do something wrong.

Male, 40 years old. He co-developed the first Tobot, Tobot ZERO, with his friend Cha Do-woon, and later developed Tobot Z on his own. During that time, he lost his wife in a tragic fire accident. Years later, he treated Kwon Semo, who was injured because of him, and adopted him as his son. He currently commands the Tobot headquarters alongside Do-woon and also serves as the pilot for Tobot ZERO. Semo is Limo's only son, and he cherishes him dearly. He is a novice dad who tries to take care of his son in any way possible, but he is a terrible cook. He is quite wealthy.

Female, 25 years old. Pilot of Tobot C. Although she is clumsy and prone to mistakes, her pride and sense of responsibility as a police officer are stronger than anyone else's. She is a police constable. Currently, the children of the Tobot team call her Officer Oh Nuna/Eonni. She is cheerful and positive, but the type to really explode when she gets angry. Because of her gentle and mature character, Do-woon and Limo trust her, and she plays the role of a guardian among the pilots. She has a great appetite and loves chicken the most.